车用汽油机过渡工况进气管内油膜动态特性建模及仿真  

Modeling and simulating the fuel film dynamic characteristic in intake pipe of automobile gasoline engine under transient condition

作　　者：吴义虎[1] 宫唤春[1] 欧林立[1] 王翠[1] 周丽[1] 

机构地区：[1]长沙理工大学汽车与机械工程学院,湖南长沙410076

出　　处：《长沙理工大学学报（自然科学版）》2008年第2期60-65,共6页Journal of Changsha University of Science and Technology:Natural Science

基　　金：国家自然科学基金资助项目(50276005)

摘　　要：分析了汽油机过渡工况时Aquino油膜模型的动态特性,提出了一种考虑进气状态参数的进气管内油膜特性动态模型.以汽油机两种过渡工况为例,利用Simulink分别对基于Aquino模型和动态模型的汽油机空燃比变化进行了仿真,并与汽油机试验数据进行对比.研究结果表明,提出的动态油膜模型能较准确地描述过渡工况进气管内燃油动态特性,其精度优于Aquino模型.The transient characteristic of the air fuel ratio in gasinoline cylinder by Aquino＇s model is analyzed. A new dynamic fuel film model is presented, in which the transient air-flow in intake pipe is considered. The variable of air fuel retia based on Aquino and preserted model and simulated by Simulink, under the two different trensierl conditions of gasoline engine. Also the simuleted results are inspected with experimental data of gasoline engine. Figures show that the dynamicl cheractertstics of intake pipe fud film can be accurately described by the presented model, and the model accuracy is higher than that of Aquino model.

关 键 词：汽油机 过渡工况 油膜动态特性 建模 仿真 

分 类 号：TK411[动力工程及工程热物理—动力机械及工程]